Group size estimator

How many trainers do I need to invite?

The Estimator is already "trainers of this attacker needed to finish inside the timer", so this page does not invent a number: it reads it off the boss's own ranked counter list for three realistic parties and re-simulates each of them at every level from 20 to 50.

Raid bossTierIVsWeatherFriendshipDodgingShadow attackersMega attackersLegendary attackers

Invite 2 to be safe — 2 if everyone is prepared

At level 40, a party of Foongus's top six counters needs 1.61 trainers (round up: 2), and a mixed lobby of ranks 13-24 needs 1.95 (round up: 2). The raid timer is 300 seconds and one prepared trainer alone would take 7:37. No level in this range makes it soloable with a prepared party. A duo works from level 25.

Foongus · Shadow Tier 5

grasspoison

Weak to

flyingfirepsychicice

Boss CP: 14,122
Boss HP: 15,000
Raid timer: 300s
Party used: 6

Trainers needed, by attacker level

Scroll sideways for the mixed-lobby column.

Trainers needed to beat Foongus at each attacker level
Attacker level	Six of the best counter	A prepared party	A mixed local group	Prepared solo time	Faints per timer
Level 20	3(2.12)	3(2.23)	3(2.72)	10:33	5.9
Level 25	2(1.84)	2(1.96)	3(2.38)	9:16	5.4
Level 30	2(1.65)	2(1.76)	3(2.14)	8:20	4.9
Level 35	2(1.56)	2(1.68)	3(2.05)	7:55	4.6
Level 40	2(1.49)	2(1.61)	2(1.95)	7:37	4.3
Level 45	2(1.42)	2(1.56)	2(1.89)	7:22	4.2
Level 50	2(1.38)	2(1.51)	2(1.82)	7:07	4.0

Whole trainers in bold, the raw estimator in brackets — 2.04 means two trainers is right on the line and three is comfortable.

Six of the best counter

Every trainer brings six copies of the single best counter — the theoretical floor.

2 trainers at level 40

Blacephalon1.49

A prepared party

Each trainer brings the boss's top six counters, powered up and correctly TM'd.

2 trainers at level 40

Blacephalon1.49
Kyurem (White)1.55
Rayquaza1.60
Mewtwo1.62
Kyurem (Black)1.69
Reshiram1.72

A mixed local group

Ranks 13-24: reasonable but unoptimised parties, which is what a public lobby usually is.

2 trainers at level 40

Enamorus (Incarnate)1.91
Toucannon1.91
Necrozma (Dawn Wings)1.92
Volcarona1.93
Cinderace1.94
Darmanitan (Standard)1.94

The party these numbers assume

1. Blacephalon

Incinerate + Mind Blown

2. Kyurem (White)

Ice Fang + Ice Burn

3. Rayquaza

Air Slash + Dragon Ascent

4. Mewtwo

Psycho Cut + Psystrike

5. Kyurem (Black)

Dragon Tail + Freeze Shock

6. Reshiram

Fire Fang + Fusion Flare

See the full ranked counter list for Foongus · check a real lobby (win chance, who brings what) · make a share card of the top six

How this is worked out

The boss is ranked once at level 40 with rankCached (the same memoised call /raids makes), then the three bands — rank 1, ranks 1-6, ranks 13-24 — are re-simulated at each attacker level with an 8-run Monte Carlo each. Holding the party fixed and moving only its level is deliberate: it answers "what if my party were level 20" rather than "what would a level-20 player's completely different party be", and it is about ten times cheaper than re-ranking every attacker seven times. The Estimator itself is Pokebattler's definition, time to win including rejoin time divided by the raid timer.